Die



' Dec. 31, 1946.

C. D. DAVIDSON DIE 'Filed Jan. 15 1945 I II 11911 tor @rZZ,F@w%s02z/Patented Dec. 31, 1946 DIE Cyril D. Davidson, Washington, Pa.

Application January 15, 1945, Serial No. 572,956

1 Claim.

This invention relates to a die, and more particularly to a die adaptedto be utilized in conjunction with a velocity power press.

A primary object of this invention is the provision of an improved dieparticularly adapted for pressing a connecting sleeve on the copperconductors (return wires, Simplex .direct current cable).

An additional important object of this invention is the provision ofsuch a die adapted to press a sleeve on the copper conductors, in suchmanner that the sleeve is condensed in a shape to allow more insulationon the return wires for vulcanizing the splice.

A still further object of the invention'is the provision of such a diewhich when utilized produces a sleeve leaving no sharp ends to protrudethrough the insulation, on either the hot wire or the return wires.

A further and more specific object of the invention is the provision ofa die adapted to produce a connecting sleeve of unique configuration,particularly adapted to return wire surrounding the hot wire of a minecable or the like.

Other objects will in part be obvious and in part be pointed out as thedescription of the invention proceeds, and disclosed in the accompanyingdrawing wherein there is shown a preferred embodiment of this inventiveconcept.

In the drawing:

Figure l is a perspective view of the die of the instant invention,shown in open position in conjunction with metal sleeve received on thecooperating block.

Figure 2 is a perspective view of the connecting sleeve produced by theuse of the die of the instant invention.

Figure 3 is a view partially'in section and partially in elevation takentransversely through the vertical center line of the top die of Figure1, and

Figure 4 is a similar sectional view through the lower die.

Having reference now to the drawing, there is generally indicated at IDa lower die, having a longitudinally extending semi-cylindrical recessII therein, in which is adapted to be positioned the metal sleeve l2, ofa mine cable or the like,

a suitable sleeve surrounding the portion thereof to be spliced.

The upper die block [3 is provided with a projecting shaft M adapted forattachment in any desired conventional manner to a velocity press. Theupper die [3 has a longitudinally extending recess [5 therein, therecess being characterized by two aligned concave depressions l6separated by a longitudinally extending convexity l1.

Now from the foregoing it will be seen that when a cable sleeve I2 ispositioned in the die, with the sections of the cable to be splicedwithin it the opposed dies Ill and [3 brought together, forming theresultant cable, as best shown in Figure 2, will take the form as shownat l2 of a circular cable sleeve I 8 having a longitudinally extendingconcave groove l9 throughout the length of the splice.

Thus if the die of the instant invention is utilized in connection withthe return wires of the round mine cable, the concavities l9 may rest inalignment with the center or hot wire, in such manner as .to providerelatively close spacing of the inner and outer wires, and at the sametime provide an adequate space for insulation about the connectingsleeve on the outer or return wires.

From the foregoing it will now be seen that there is herein provided adie accomplishing all the objects of this invention and others includingmany advantages of great practical utility and commercial importance. v

As many embodiments may be made of this inventive concept, and as manymodifications may be made in the embodiment hereinbefore shown anddescribed, it is to be understood that all matter herein is to beinterpreted merely as illustrative and not in a limiting sense.

I claim:

A cable die comprising a, fixed lower block having a semi-cylindricallongitudinal groove therein, and an upper die movable towards said blockto engage the same and having a groove therein characterized by alongitudinally extending convexity, the sides of said convexity merginginto aligned concavities, said block adapted to receive a metal sleeve,and said die when forced to engage said block and sleeve shaping thesleeve to have spaced concave sides substantially parallel with eachother throughout their length.

CYRIL D. DAVIDSON.

